As we look back over the landscape of this endeavor, what we have is a well established metric for ocean mixing [1]} which does not have a first principles support. At best, the Finescale Parameterization is underpinned by a heuristic description as an advective spectral closure [2]} in the context of an energy transport equation that eschews action conservation. Application of Wave Turbulence arrives at a Fokker-Planck equation expressing wave action conservation that predicts no downscale transports. Application of path integral techniques in part I arrives at a combined advection / diffusion transport equation. In this paper we utilize an idealized representation of high frequency oceanic internal waves propagating in a background of inertial waves to obtain concrete closures for the path integral formulations. These closures recover the wave turbulence kinetic equation diffusivity and identify the mean drift as the gradient of the kinetic equation diffusivity in vertical wavenumber. This represents qualitative progress in reconciling observations with theory. However, predictions for energy transport associated with the mean drift are an order of magnitude larger than the observations. Ray tracing simulations are conducted to assess these closures. There is a tendency for the mean drift to be reduced from these scalings at oceanic amplitude, but this reduction is insufficient to ameliorate the glaring discrepancy between prediction and observation. There is a wealth of information available in the ray tracing simulations concerning phase locking and correlation times scales that enable us to effectively order the time scales of a cumulant hierarchy.
